Joseph J. Yosko was an American politician who represented the Lehigh Valley in the Pennsylvania State Senate for the 18th district as a Democrat from 1949 until his death in 1958.
While he was still a child his family moved to Bethlehem, Pennsylvania and Yosko attended a Parochial school.
He then worked as State Senator Warren R. Roberts' secretary, introducing him to his political career.
He then served as Director of Public Assistance and Unemployment Compensation for the Bureau of Disbursements for the Pennsylvania Treasurer from 1940 to 1944.
Yosko would be elected to the State Senate in 1949 and served for 9 years and 10 months until his death on September 19, 1958.